Effect of the Principal Stress Direction on Undrained Cyclic Behaviour of Saturated Silt Using a Hollow Cylinder Apparatus


Abstract eng:
The impact of fabric anisotropy on the behaviour of soil has been paid great attention; however, the effects of the principal stress direction on the cyclic undrained response of saturated silt are not fully understood. An experimental study aimed at providing insights into the effect of principal stress direction on the cyclic behaviour of saturated silt with a relative density of 50% under isotropic consolidation condition is presented. A series of cyclic shear tests were conducted by GDS hollow cylinder torsional apparatus that can apply four dynamic loads, namely inner pressure, outer pressure, axial load and torque. Specimens at identical initial states were subjected to 90° jump rotation of principal stresses from different principal stress direction angle ασ0 at the initial time of cyclic loading with a constant intermediate principal stress coefficient. This investigation was placed on the influence of ασ0 on the pore pressure response, deformation characteristics and cyclic shear strength. The results show that the principal stress direction has a considerable influence on cyclic shear strength of saturated silt. It decreases significantly as the ασ0 increased to approximately 45°, and then increases with the ασ0 increased to 90°. This observation is considered to be directly related to the soil fabric anisotropy.

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Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
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Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


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